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From Nirmal Fernando <nirmal070...@gmail.com>
Subject Re: CEP seems to be emiting stats even though there are no incoming requests...
Date Sat, 11 Jan 2014 17:16:44 GMT
There's a possibility that CEP would emit an event in this scenario (since
CEP aggregates events came in a specific time period). This cannot be
solved at CEP end, I think the solution would be to discard events that are
not relevant at Auto-scaler end. Wdyt?


On Sat, Jan 11, 2014 at 10:11 PM, Lahiru Sandaruwan <lahirus@wso2.com>wrote:

> $subject.
>
> For e.g. there is no instances in the cluster
> "lahiru123.isuruh.lk.php.domain " since the user has unsubscribed.
> But Autoscaler has received a stat event [1]..
>
> [1]
> TID: [0] [Agent] [2014-01-11 16:34:39,696] ERROR
> {org.apache.stratos.autoscaler.message.receiver.health.AutoscalerHealthStatReceiver}
> -  A cluster monitor is not found in autoscaler context [cluster]
> lahiru123.isuruh.lk.php.domain
> {org.apache.stratos.autoscaler.message.receiver.health.AutoscalerHealthStatReceiver}
> TID: [0] [Agent] [2014-01-11 16:34:39,696] ERROR
> {org.apache.stratos.messaging.message.receiver.health.stat.HealthStatEventMessageDelegator}
> -  Failed to retrieve instance notifier event message
> {org.apache.stratos.messaging.message.receiver.health.stat.HealthStatEventMessageDelegator}
> java.lang.RuntimeException: A monitor is not found for this cluster
> at
> org.apache.stratos.autoscaler.message.receiver.health.AutoscalerHealthStatReceiver.handleMemberFaultEvent(AutoscalerHealthStatReceiver.java:1084)
>  at
> org.apache.stratos.autoscaler.message.receiver.health.AutoscalerHealthStatReceiver.access$300(AutoscalerHealthStatReceiver.java:49)
> at
> org.apache.stratos.autoscaler.message.receiver.health.AutoscalerHealthStatReceiver$9.onEvent(AutoscalerHealthStatReceiver.java:753)
>  at
> org.apache.stratos.messaging.listener.EventListener.update(EventListener.java:42)
> at java.util.Observable.notifyObservers(Observable.java:142)
>  at
> org.apache.stratos.messaging.event.EventObservable.notifyEventListeners(EventObservable.java:51)
> at
> org.apache.stratos.messaging.message.processor.health.stat.MemberFaultMessageProcessor.process(MemberFaultMessageProcessor.java:50)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.SecondDerivativeOfMemoryConsumptionMessageProcessor.process(SecondDerivativeOfMemoryConsumptionMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.GradientOfMemoryConsumptionMessageProcessor.process(GradientOfMemoryConsumptionMessageProcessor.java:58)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.AverageMemoryConsumptionMessageProcessor.process(AverageMemoryConsumptionMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.SecondDerivativeOfLoadAverageMessageProcessor.process(SecondDerivativeOfLoadAverageMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.GradientOfLoadAverageMessageProcessor.process(GradientOfLoadAverageMessageProcessor.java:59)
> at
> org.apache.stratos.messaging.message.processor.health.stat.AverageLoadAverageMessageProcessor.process(AverageLoadAverageMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.SecondDerivativeOfRequestsInFlightMessageProcessor.process(SecondDerivativeOfRequestsInFlightMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.GradientOfRequestsInFlightMessageProcessor.process(GradientOfRequestsInFlightMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.AverageRequestsInFlightMessageProcessor.process(AverageRequestsInFlightMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.MemberSecondDerivativeOfMemoryConsumptionMessageProcessor.process(MemberSecondDerivativeOfMemoryConsumptionMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.MemberGradientOfMemoryConsumptionMessageProcessor.process(MemberGradientOfMemoryConsumptionMessageProcessor.java:60)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.MemberAverageMemoryConsumptionMessageProcessor.process(MemberAverageMemoryConsumptionMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.MemberSecondDerivativeOfLoadAverageMessageProcessor.process(MemberSecondDerivativeOfLoadAverageMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.MemberGradientOfLoadAverageMessageProcessor.process(MemberGradientOfLoadAverageMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.health.stat.MemberAverageLoadAverageMessageProcessor.process(MemberAverageLoadAverageMessageProcessor.java:59)
>  at
> org.apache.stratos.messaging.message.processor.MessageProcessorChain.process(MessageProcessorChain.java:60)
> at
> org.apache.stratos.messaging.message.receiver.health.stat.HealthStatEventMessageDelegator.run(HealthStatEventMessageDelegator.java:79)
>  at java.lang.Thread.run(Thread.java:662)
>
>
> --
> --
> Lahiru Sandaruwan
> Software Engineer,
> Platform Technologies,
> WSO2 Inc., http://wso2.com
> lean.enterprise.middleware
>
> email: lahirus@wso2.com cell: (+94) 773 325 954
> blog: http://lahiruwrites.blogspot.com/
> twitter: http://twitter.com/lahirus
> linked-in: http://lk.linkedin.com/pub/lahiru-sandaruwan/16/153/146
>
>


-- 
Best Regards,
Nirmal

Nirmal Fernando.
PPMC Member & Committer of Apache Stratos,
Senior Software Engineer, WSO2 Inc.

Blog: http://nirmalfdo.blogspot.com/

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